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(45) Shape of the shuttle race ring
If wear seems to be too much around the pointed tip of the inner hook, release the shuttle race ring and
confirm that the dimensions of the hatched area on the rear side are 0.3 x 8mm.
(46) Adjustment of thread take-up spring
8mm
Dimension A
0.3mm
Stroke : The movable distance of the needle thread when the needle thread is pulled in the direction
A
until
the thread take-up spring stops. 12 to 15 mm for S type, 12 to 18 mm for H type.
Tension : Adjust the thread take-up spring tension in accordance with the thread tension. (Actually sew a
material and adjust the thread take-up spring tension to an appropriate value.)
Standard Adjustment
Standard Adjustment
A
B
When thread knots
are made.
12 to 15mm
C
Increase
Decrease
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